Drinking water comes from surface water or ground
water. Surface water sources include lakes,
rivers, and reservoirs. Sometimes surface water
sources are close to the community, but other
times they are many miles away. Ground water is
pumped from vast underground reservoirs (aquifers)
via wells. Aquifers vary in size from a few miles
wide to the size of entire states.

Answer 2:

Drinking water comes from wells or reservoirs,
both of which are ultimately supplied by rainfall.
The water is then piped from its source to your
tap. Wells get their water from groundwater that
is water seeping through the ground. Reservoirs
are lakes; they are fed by rivers.